Osmosis
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Osmosis
The net movement of water from a region of high water potential to a region where it has lower water potential
Units for pressure of osmosis
Kilopascals (Kpa)
Symbol of water potential
Psi (Fork shape)
Under standard conditions of temperature what is water pressure
0
Is osmosis passive or active
Passive
What does adding solute do to the water potential
Decrease it (Makes it a negative value)
Why do water particles move by osmosis
Water particles move due to the kinetic energy they possess
If the plant there is a animal red blood cell in osmosis surrounded by pure water what will happen
Water will go into the cell by osmosis and the cell will burst as too much water will come in. The water comes in cause the cell has lower water potential as it has solutes. The bursting of the cell is called haemolysis
What happens if the animal red blood cell is surrounded by a solution with equal water potential
No net movement of water and cell remains the same . (plasma has same water potential as red blood cells)
What happens if the animal red blood cell is surrounded by highly concentrate solution
Water will move out of the animal cell by osmosis into the solution so the cell will shrink and shrivel due to the water lost
If a plant cell is surrounded by pure water what will happen
Water goes in the cell as the cell has solutes in which makes it negative water potential. The cell starts to expand and instead of bursting it becomes turgid as it has a cell wall.
If a plant cell is surrounded by a solution with equal water potential what will happen
The plan cell will have no net movement and will stay flaccid
What will happen if a plant cell is surrounded by a highly concentrated solution .
Water goes out of the cell and the cell shrivels up
Hypertonic
A solution with a higher concentration of solutes than the cells cytoplasm. This means the solution has less water then the cell and water will move out the cell
Hypotonic
A solution with a lower concentration of solutes than the cells cytoplasm . This means that the solution has more water than the cell and the water will move into the cell
Isotonic
A solution with the same water potential of the cells cytoplasm
Plasmolysis
A process involving a plant cell losing water content and therefore contracting and shrinking its cytoplasm
Haemolysis
Water bursting an red animal blood cell by going in